These low profile cherry bomb adapters are 17-4 H900 stainless steel with a 1.5″ OD x .2″ thick flange and weigh 2.6 ounces. They install with a hook type spanner wrench
Threads and taper are in spec. The blem feature is the front hole; it exceeds the .787″ +/-.001″ tolerance.
Blem adapters are marked with a discreet dimple on the front, visible in the images.
